Brake-shoe.



J. D. GALLAGHER & H. JONES.

' BRAKE SHOE- APPLICATION FILED MAY 4, 1915.

Patented Nov. 2, 1915.

In Ven tors:

Jasepkll Gallqyker flanyJb/zas flak Atty Uru'rn, swans PA JosErH n. GALLAGHER, or GLEN RIDGE, NEW JERSEY, AND HARRY Jonnspr ,SUFFERN, NEW YORK, ASSIGNORS T AMERICAN 'BRAKESI-IOE & FOUNDRY COMPANY, OF MAHWAI-I, NEW JERSEY, A oonronA'rIoN or NEWJERSEY.

BRAKE-SHOE.

Specification of: Letters Patent,

Patented Nov."2 1915.

Application filed Maya, 1915, Serial No. 25,683.

T 0 all whom it may concern:

Be it known that we, JosnrH D. GAL- LAGHER, a citizen ofthe Uni-ted States, and a resident of Glen Ridge, county of Essex, and State of New Jersey, and HARRY J ONES, a citizen of the United States, and a resident of Sufi'ern, in the county of Rockland and State of New York, have made andu invented certain new anduseful Improveforms. p i

ity, and weakness in chilled shoes, it has 'ments in Brake-Shoes,.of whichfthe following is a specification.

This invention relates to brake shoes." An object of the invention is to provide a brake shoe formed of a number of hard and soft sections, so as to eombinethe requiu p p 1 vided by the body metal of the shoe.' As the site frictional properties with long wearing qualities.

'In" the casting of brake shoes having hard and soft sections, the usual practice has been i to make one integral casting of" what is from a quarter of an inch in, depth toan inch and a quarter, owing to the condltlonsunder which'the shoes are, made, and even though the iron was all obtained from the same cupola, and even from the same tap of that cupola. Again, often in obtaining the proper depth of chill, the conditions of, pouring might be such that the iron 'in'the sections intended to be soft would bepartly chilled, and the frictional effect of the sec tion either materially reduced for, lost. Again, in making brake shoes having alternating chilled and unchilled sections in one casting, the" process of chilling sets up in the internal structure of the shoe very severe strains and stresses, which aga n con stantly vary, and brake shoes apparently? perfectly sound may be, on account of these strains and stresses,very weak lnstructure and readily go:to pieces in service, espea cially under the conditions of repeated heating and cooling, due to the service it per To overcome this lack of uniformbeen the practice to' embed in the body of 1 the brake shoe, hard iron or steel dovetailed inserts, which are held in their place by the cast metal of the shoe body, thereby insuring during the life of these inserts, a uniform distribution of hard and soft sections on .the wearing face, of the shoe. The objections to this practice are that as it -is not practical to'inake the inserts of the full dept-h of theshoe, that is, of thickness suffi elent to extend from the face to the back of the shoe, the inserts wear out beforethe simplv the cast iron wearing surface pro- I braking pressures required for acomposite surface are entirely different from those required for a plain surface of cast iron, the p I change fromone surface to thefiothe'r, without cha n ein brake pressure, is apt to have abad e ect'both on the brake mechanism and thewheel. Another objection to this practice lies in the fact that these inserts, i owing to the severe conditions of service,

are aptto"beco-melloosenedand detached 7 from the shoe, changing-the character of the wearing face-and leaving pockets therein which are apt to result'in the scoring of the wheel.

It is among theobjects of the present vent ion to provide a type ofbrake shoe .wherein a substantially uniform brake shoe; can be produced, and one that will be free from'the weakness of chilled shoes and the wearing surface of which will" remain unchanged'throughout its life, with this ondly, a soft metahwhichpossesses the exact characteristics of softness, so that an extremely eflicient composite wearing body is obtained, and these metalsextend from with a distinct division or spacing between ,each sectiolnso that althoughthe'sho'e be come heated by contact 'with a car wheel, it.

will not'straighten ouflbut will maintain its original contour, eachsectlonbeing allowed 105, to expand independently of the adjacent 65 V shoe is worn "out and then the composite wearing face is lost and the face becomes endin View, two metals are used, one a hard metal, which may be a chilling metal possessing the required properties, and see- I ones, and the strains and stresses found in a chilled shoe, and to a considerable extent in the usual insert shoe, will be absent.

A further object is to provide a brake shoe with a reinforcing back, to which are anchored hard and soft sections, and in which is incorporated a reinforcing member in the form of a bundle of expanded metal or Wire mesh, the same extendingthrough= out the entire length of the sections, whereby all are anchored and tied together, as well as being securely anchored to the reinforcing back. Each section, in itself, therefore possesses a composite wearing surface made up of the cast metal of the section and the malleable metal of the reinforcing mem- 'ber.

Other objects and advantages will appear as the description proceeds, wherein it is to be noted that changes in the precise embodiment of the invention can be made within the scope of what is claimed, without departing from the spirit thereof.

The preferred embodiment of our invention is disclosed in the accompanying drawings, wherein 7 Figure 1 is a view in plan of the back of a brake shoe embodying the novel features of our invention; Fig. 2 is a plan view of the front or wearing face thereof, with portions broken away to more clearly disclose the various features of. construction; Fig. 3

is a view in side elevation, partly in section, of our novel brake shoe; and Fig. 4 1s a cross-sectlonal View taken on the line 11 of Fig. 1.

Referring specifically to the several views,

a reinforcing back 10 is provided with the integral lug 11, and is formed with the openings 12 extending lengthwise of the back, and both sides of the longitudinal center thereof. The reinforcing back is of the usual and preferred form, and has associated therewith a bundle of expanded metal or wire mesh13, the same acting as a reinforcing or bindlng member for the sections of the shoe, and is substantially equal in length to the length of the reinforcing back.

The body or wearing portion of the shoe includes the hard metal end sections lei-14, which are poured or cast around the expanded metal or wire mesh 13, the shoe be- 7 metal central section 15 is cast about the reinforcing member 13, and is accordingly securely anchored to the hard metal end sections, and is also securely anchored to the reinforcing back by the metal which flows up through the openings 12.

The separate and'independent casting of the various sections provides a distinct line, or division, or space, between each section, allowing them to expand independently, so that although the sections become heated during service, the original and proper contour of the shoe will be preserved. The isolation, or slight separation, of each section of the shoe also materially increases the radiating surface thereof, and provides ample opportunity for the dissipation of such heat as is generated therein. The exact number and arrangement of the hard and soft metal sections may be varied, as desired, as is consistent with the requisite frictional and wearing qualities.

What we claim is 1. A brake shoe provided with a reinforcing back and having a body anchored thereto, said body being formed of separated sections of hard and soft metals.

2. A brake shoe comprising sections of hard and soft metals, and a reinforcing member of openwork metal embedded in said sections.

3. A brake shoe comprising separated sections of hard and soft metals, and a reinforcing member of openwork metal embedded in said sections.

4; A brake shoe comprising a reinforcing back, separated sections of hard and soft metal anchored thereto, and a reinforcing member of openwork metal embedded within said sections.

5. A brake shoe comprising a reinforcing back, a bundle of openwork metalextending the entire length thereof, and separated sections of hard and soft metal anchored to said back and embedding said openwork metal therein, said sections extending from the face to the back of the shoe.

6. A brake shoe comprising a reinforcing back, a binder extending substantially the entire length thereof, and sections of relatively hard metal anchored to said back and embedding the binder therein, and a section of relatively soft metal anchored to said back and embedding said binder therein.

7. A brake shoe comprising a reinforcing back and a body formed of sections of relatively hard and soft metals cast tosaid back.

8. A brake shoe comprising a reinforcing back and a body of isolated sections of relatively hard and soft metals cast to said back. I v

9. A brake shoe comprising a reinforcing back and a body formed of sections of rela tively hard and soft metals cast to said back, said sections extending from the face to the back of said shoe.

10. A brake shoe comprising a reinforc-r ing back and a body formed of isolated or separated sections of relatively hard and soft metals cast to said back, said sections extending from the face to the backof said I shoe.

11. A brake shoe comprising a reinforcing back, sections of hard metal cast to said back and disposed at the'ends thereof, and a section of relatively soft metal cast to said back and disposed between the said end sections. 1

12. A brake shoe comprising a reinforcing back, and isolated or separated sections of hard and soft metals cast to said back, and a binder extending substantially the entire length of, and embedded within, said sections. I

13. A brake shoe comprising a reinforcing back, a bundle of openwork metal extending substantially the entire length thereof, and sections of hard metal anchored to the ends of said back and embedding the ends of said openwork metal, and a section of soft metal between said hardmetal ends and separated therefrom.

14:. A brake shoe comprising a reinforcing back, abundle of expanded metal ex tending substantially the entire length thereof, and sections of hard steel anchored to the ends of said back and embedding the ends of said expanded metal and a section of soft metal between said steel ends, but sepa' ing steel back, a bundle of expanded metal of substantially the thickness of the completed shoe extending substantially the entire length of the completed shoe and sectionsof hard crucible steel anchored to the ends of said backand embedding the ends of said bundle of expanded'metal and a section of comparatively soft iron between said crucible steel ends but separated therefrom.

17. Abrake shoe comprising-a reinforcing back, a bundle of openwork metal extendlng substantially. the "entire length thereof, and :sections of hard metal anchored to the ends of said back and em- 5 bedding the ends of said openworkmetal and extending from the face "to the back of the shoe, and .a section of soft metal between said hard metal ends and separated therefrom.

18. A brake shoe comprising a reinforc-' ing back, abinder extending substantially the entire length thereof, sections of metal cast upon said reinforcing back and em-' bedding said binder therein, said sections possessing long wearing qualities, and a sec- 7 tion of metal disposed [between the aforementioned sections, cast to said back and embedding saidbinder therein, said section possessing high frictional qualities.

Signed at New York, in the county-of New York, and State of New York, this 27 day of April, 1915,.

Witnesses:

ANNA V. WALSH, GEORGE E. .Co'ox.

' Signed at Suffern, in the county of Rockland, and State of New York, this 30th day of April, 1915.

HARRY JONES.

l/Vitnesses: I

FRED B. HOAGLAND, V lVA'LLAoE SUTHERLAND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, 11C.

JOSEPH D. GALLAGHER.- 

